I'm not able to change the ISO using the back wheel on the XF body. The ISO highlights on the XF display but doesn't change anything on the Credo 50. In order to change the ISO i have to do it on the Credo. Is there something I'm missing? Thanks.

In addition the XF body does not allow you to configure body options from the back itself. It is possible to configure all manner of body options from the IQ1 100MP and IQ140 for the DF+ body. I am very frustrated to have spent so much money on the XF only to LOSE extremely useful functionality over the older DF+ back.